Home / 142,234.78-196,289.94-81,805.45

Finding the Fourth Proportional to 142,234.78, 196,289.94 and 81,805.45

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Solution

The fourth proportional to 142,234.78, 196,289.94 and 81,805.45 is: 112,894.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,234.78 : 196,289.94 = 81,805.45 : x
  2. Step 2: Convert to fraction form
    142,234.78/196,289.94 = 81,805.45/x
  3. Step 3: Cross multiply
    142,234.78x = 196,289.94 × 81,805.45
  4. Step 4: Simplify right side
    142,234.78x = 16,057,586,872.17
  5. Step 5: Solve for x
    x = 16,057,586,872.17/142,234.78
  6. Step 6: Final answer
    x = 112,894.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.